Write to the seller before it closes
Use the details on your order confirmation, which is where the order number lives, and ask for a return authorisation. Day fifty-nine is fine. Day sixty-one is not.
Sixty days from the day your card is charged, covering bottles you have opened and been taking.

That clause is the entire argument, and it is the first thing to look for on any money-back promise anywhere. A policy accepting only sealed, unopened product cannot be claimed by a single person who actually tried the thing, which makes it a photograph rather than a promise.
Use the details on your order confirmation, which is where the order number lives, and ask for a return authorisation. Day fifty-nine is fine. Day sixty-one is not.
Whatever is left, empty bottles included, on a tracked service. The journey back is at your expense, and this is the step people overlook when comparing guarantees.
To the card that paid, once the return has arrived and been processed. Original delivery, where it was charged, is not usually part of it.
Two things to plan around. Return postage is yours, and a six bottle order reaches the end of its window with most of the bottles unopened. Both are ordinary and neither is tucked away on this page. Both are far better known at the point of ordering.
Nothing about it promises the product works. What it promises is your money back if it does not, a narrower claim and a far easier one to verify. No product here can honestly promise the first, and the attempt itself is informative.
The window belongs to the seller who took the order. A bottle bought from a marketplace listing or a third-party shop was sold by a different party, so the sixty days stay behind. Every order button here opens the official checkout for precisely that reason.

The window covers the bottles you open. That is the version of this promise worth having.